civil forensic

Chapter 1056 Exploration

Chapter 1056 Exploration

"How did the victim Sun Xiuwen's stepfather be cleared of suspicion?" Jiang Yuan waved his hand, motioning for forensic doctor Tang Feng to sit down.

The case was just in the beginning stage of investigation. Half a month had passed and Jiang Yuan did not seem to be in a hurry and asked slowly.

Cao Chujun moved his body and faced Jiang Yuan, saying, "It's mainly a question of the time of the crime. The victim's mother testified that her husband was with her between 6 and 8 in the morning."

"Do husband and wife have mutual testimony?" Wang Chuanxing asked when Jiang Yuan didn't speak immediately. In such small-scale discussions, even rookie police officers can usually interrupt and occasionally say something outrageous without being blamed.

Cao Chujun smiled and said, "Although they are husband and wife, the witness is the victim's mother after all, and she has some evidence."

"What evidence?" Wang Chuanxing asked.

"Condoms." Cao Chujun answered, and then explained more clearly, "Around 6 o'clock that day, the two had sex, and the condoms were thrown into the trash can. The evidence has been collected."

Wang Chuanxing was surprised: "Two hours?"

Cao Chujun looked at Wang Chuanxing strangely and said helplessly, "He was conscious before and after. The two had a conversation last night. Given the time period of the victim's death, the victim's stepfather should not have had time to commit the crime."

"The time of death needs to be considered." Jiang Yuan suddenly said at this time, interrupting the communication between the two.

Cao Chujun was stunned, then turned around and sat down.

Jiang Yuan's accuracy in judging the time of death has long been a legend in the field of domestic investigation. Back then, a photo revealed the omissions of Beijing experts in the missing gun case, and then he solved the long-standing case. His skills were amazing, and since then, few people dared to question Jiang Yuan's time of death.

Changyang City's own forensic doctor Tang Feng also hurriedly looked through the information, not daring to say a word of questioning.

Jiang Yuan said: "Before the case happened, it was raining in the area, which means the temperature has dropped. When the temperature drops, the relationship between corpse temperature and time of death needs to be reconsidered. This is one reason."

Jiang Yuan looked at Tang Feng and continued, "The problem of rigor mortis is the same. I won't go into detail here, but judging from the body's physical features, the victim's death time is earlier than expected. The most important thing is..."

Jiang Yuan took the remote control and put a few pictures on the PPT. He said, "The state of these insects can better reflect the local temperature conditions, especially these nymphs... I judge that the victim's time of death should be between 3 and 4 in the morning of the same day."

This is equivalent to pushing the time forward by 3 hours, and all previous investigations may have to be started over again.

Tang Feng said hurriedly: "Captain Jiang, I'm not questioning it, but it seems that it's not easy to make mistakes in measuring liver temperature."

"You measured liver temperature too few times and a little late. In addition, the area where the body was located was right under the cliff, and the temperature was much lower than the normal road temperature..." Jiang Yuan explained why the mistake was made.

Tang Feng understood it quickly: "There are some inappropriate aspects of the solution we used... Then what do you think is the best way to determine the time of death?"

He still wants to learn.

Jiang Yuan said: "From the current point of view, it is insects. Although the first scene is not here, the body of the deceased was dumped in the wild for a long time, and there are many types of necrophilous insects. Using forensic entomology, the judgment will be more accurate."

Tang Feng smiled bitterly. Although forensic entomology is simpler than forensic botany and not as difficult as forensic anthropology in terms of pure difficulty, this kind of thing is still obviously beyond the syllabus. Ordinary forensic scientists will learn a little bit, but basically will not have a very in-depth understanding of it.

In short, as far as Shannan Province is concerned, most of the forensic doctors in prefecture-level cities and counties do not even have Level 1 forensic entomology technology. Changyang City is no exception. On the contrary, there are a few forensic doctors in remote cities and counties who may be bored or have some opportunities to learn some forensic entomology on their own.

Cao Chujun didn't have time to deal with Tang Feng's emotions, and said directly: "In this case, the time of death is between 3 and 4 in the morning of the same day! In this way, the victim's stepfather is back on the list of suspects!"

Jiang Yuan held a new PAD, flipped through some photos, and nodded: "It can be corrected like this."

If it was a purely current case, he could look at the body again and study it. For a current case from half a month ago, this condition was no longer available, and he could only make a judgment based on the photos, so it was more difficult.

Tang Feng naturally said nothing. Although he was also a forensic doctor from the Changyang Municipal Bureau and sometimes provided support to local city and county forensic doctors, compared with a national-level boss like Jiang Yuan, he could only adopt the attitude of a primary school student.

Cao Chujun stood up: "Well, I will immediately send someone to bring the victim's stepfather here. Also organize people to re-investigate the victim's home. If it was the stepfather who committed the crime, the first scene is still very likely to be in his own home. However, there were no obvious traces or discoveries during the first investigation..."

As he spoke, he looked at Jiang Yuan.

Jiang Yuan smiled and took the initiative to say: "Then I will go to the victim's home to take a look. I will also take a look at the place where the body was dumped."

"Okay! That's great!" Cao Chujun quickly agreed.

The on-site investigation was like the forensic examination. If there was no result the first time, it would be even more difficult to get a result the second time. Especially now that more than ten days had passed, if the suspect had further cleaned his home, Cao Chujun was not very confident that he could find some evidence.

In addition, Jiang Yuan led his men into the car and set off for Hualing Township. The Criminal Branch Center of Changyang City Bureau also sent two cars to accompany them. Together with the two cars of the Criminal Police Detachment, the entire convoy had a total of ten cars.

Looking at the huge team leaving the yard of the Criminal Police Detachment, Yu Wenshu stood in front of the window of his office, and suddenly a sentence came to his mind: I have never fought such a rich battle.

Looking at this situation, Yu Wenshu felt that if someone needed to be arrested in the future, there would be no need to send people from his own criminal police detachment.

As he watched the convoy moving away, Yu Wenshu could not help but recite a poem: "…I have been a guest on the rivers and seas for three years, and have fought in hundreds of battles. Who can resist getting drunk and drowning in the clear waters of Zhangzhou?"

This is "Night Drinking" by his favorite poet Li Shangyin. The reason why he liked Li Shangyin was not for any other reason, but because Li Shangyin's poems were complicated enough that others could not memorize them, but he could easily remember them after just one look.

Yu Wenshu thought back to Jiang Yuan's performance in the conference room just now, and couldn't help thinking: This guy is like me!

……

Hualing Township.

Sun Xiuwen's house is a two-story self-built house. The door of the large courtyard is directly adjacent to the country road. When you open the gate, you will see the road. However, there are few pedestrians and vehicles on the road, so it feels quite quiet.

The whole village is sparsely built, basically in a long strip. Some families' houses are built more densely, which are mostly the houses of several brothers, or the previous generation is a group of brothers.

The village has long had access to water, electricity and the internet, and is located in a township under the provincial capital. It only takes 20 minutes to ride a motorcycle to the nearest town, and less than 10 minutes to the nearest market, so life is not inconvenient. However, the village itself still feels remote and desolate. Especially when a large amount of farmland is abandoned, the areas a little further away from the village are covered with half-human-high weeds.

The place where Sun Xiuwen dumped her body was right on the roadside, which was a little careless in some ways. If the murderer was willing to walk a dozen meters further in, he would probably have to rely on smell and luck to be discovered.

But from another perspective, this is also a smart approach. Dumping the body directly a few meters away from the roadside would leave very few traces. Coupled with the rain, the trace examiners obtained almost no useful information.

At Sun Xiuwen's house, Jiang Yuan, who was trying hard to find the original scene, never found it.

Sun Xiuwen lived in a room on the east side of the two-story house. The furnishings inside were simple, with a bed, a table, a bookcase, a wardrobe, etc. If there were any special things, they were just some dolls of girls.

At this time, even the dolls were turned out and checked one by one to see if there were any signs of suffocating the victim.

"Have you cleaned or replaced the bedding, pillows and other things in this room?" Jiang Yuan called the victim's mother over and asked.

The victim's mother was only in her 30s. She cried and shook her head vigorously: "No. After Wenwen left, I never moved anything in the room. The room has been locked for the past few days."

"What about your husband? Did he change or throw anything away?"

"No, I won't let him move."

Jiang Yuan couldn't ask any more questions after this point, so he had to let the victim's mother leave and paced around the room again.

He also checked several other rooms in the house and found no signs of murder.

If the stepfather is the suspect, the probability that the room is the first crime scene should be very high. Because sexual assaults between acquaintances often occur in places that one or both parties are familiar with. For murders that happen at 3 a.m., even if the crime happened earlier, both parties should have gone to bed...

Jiang Yuan reluctantly scanned the room again. At this time, he saw several crumpled jeans in the closet.

Picking it up, Jiang Yuan couldn't help but frown.

Sun Xiuwen's room was relatively tidy, but these pairs of jeans, not to mention being folded and hung up, still had some stains on them that had not been washed.

Jiang Yuan was caught up in thought, so he turned around, opened the window, and looked down.

The stains on the wall are indeed similar.

"Rapunzel!" Jiang Yuan waved to the two people and asked them to take a photo.